Traffic, Transit, and Bicycling Layers

The Traffic, Transit, and Bicycling layers modify the base map layer to display
current traffic conditions, local transit networks, or bicycling route information.
These layers are available in select regions.

Traffic Layer

The Maps JavaScript API allows you to add real-time traffic
information (where supported) to your maps using the TrafficLayer
object. Traffic information is refreshed frequently, but not instantly. Rapid
consecutive requests for the same area are unlikely to yield different
results.

Transit Layer

The Maps JavaScript API allows you to display the public transit network of a city
on your map using the TransitLayer
object. When the Transit Layer is enabled, and the map is centered on a city
that supports transit information, the map will display major transit lines as
thick, colored lines. The color of the line is set based upon information from
the transit line operator. Enabling the Transit Layer will alter the style of
the base map to better emphasize transit routes.

Transit information is only available in select locations. To see a list of
cities where public transit information is currently available, please
consult this list.

If you’re a public agency that oversees public transportation for your city and
would like your data to be included, please visit
the Google Transit Partner
Program site to learn more.

The following example shows the Transit layer enabled on a map of London, UK:

Bicycling Layer

The Maps JavaScript API allows you to add bicycle information to your maps using
the BicyclingLayer object. The BicyclingLayer renders a layer of bike
paths, suggested bike routes and other overlays specific to bicycling usage on
top of the given map. Additionally, the layer alters the style of the base map
itself to emphasize streets supporting bicycle routes and de-emphasize streets
inappropriate for bicycles.

The following example shows the Bicycle layer enabled on a map of
Cambridge, MA: